The Dymaxion was completed during 1929 after two years of development, and later redesigned during 1945. Buckminster Fuller wanted to mass produce a bathroom and a house. His first "dymaxion" design was based on the design of a grain bin. During World War II, the U.S. Army commissioned Fuller to send these housing units to the Persian Gulf. The Siberian grain-silo house was the first system in which Fuller noted the "dome effect." Many installations have reported that a dome induces a local vertical steam driven vortex that sucks cooler air downward into a dome if the dome is vented properly (a single overhead vent, and peripheral vents). Fuller adapted the later units of the grain-silo house to use this effect. The final design of the Dymaxion house used a central vertical stainless-steel strut on a single foundation. Structures similar to the spokes of a bicycle-wheel hung down from this supporting the roof, while beams radiated out supported the floor. Wedge-shaped fans of sheet metal aluminum formed the roof, ceiling and floor. Each structure was assembled at ground level and then winched up the strut. The Dymaxion house represented the first conscious effort to build an autonomous building during the 20th century. It was a prototype proposed to use a packaging toilet, water storage and a convection-driven ventilator built into the roof. It was designed for the stormy areas of the world: temperate oceanic islands, and the Great Plains of North America, South America and Eurasia. In most modern houses, laundry, showers and commodes are the major water uses, with drinking, cooking and dish-washing consuming less than 20 liters per day. The Dymaxion house was intended to reduce water use by a grey water system, a packaging commode, and a "fogger" to replace showers. The fogger was based on efficient compressed-air and water degreasers, but with much smaller water particles to make it comfortable.